四方相氧化钇稳定氧化锆热障涂层的热循环和热冲击性能及其失效机理

doi:10.11901/1005.3093.2023.471

材料研究学报

2024, Vol. 38

Issue (9): 691-700 DOI: 10.11901/1005.3093.2023.471

研究论文

本期目录 | 过刊浏览

四方相氧化钇稳定氧化锆热障涂层的热循环和热冲击性能及其失效机理

黄迪¹^,², 牛云松¹^,³, 李帅¹, 董志宏¹^,², 鲍泽斌¹^,²(

), 朱圣龙¹^,²

1 中国科学院金属研究所师昌绪先进材料创新研究中心沈阳 110016
2 中国科学技术大学材料科学与工程学院沈阳 110016
3 北京科技大学新金属材料国家重点实验室北京 100083

Thermal Cycling and Flame Thermal Shocking Failure Mechanism of Tetragonal Yttria-stabilized Zirconia TBCs Prepared on High Temperature Alloys by Suspension Plasma Spraying

HUANG Di¹^,², NIU Yunsong¹^,³, LI Shuai¹, DONG Zhihong¹^,², BAO Zebin¹^,²(

), ZHU Shenglong¹^,²

1 Shi -Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
3 University of Science and Technology Beijing, State Key Laboratory for Advanced Metals and Materials, Beijing 100083, China

引用本文:

黄迪, 牛云松, 李帅, 董志宏, 鲍泽斌, 朱圣龙. 四方相氧化钇稳定氧化锆热障涂层的热循环和热冲击性能及其失效机理[J]. 材料研究学报, 2024, 38(9): 691-700.
Di HUANG, Yunsong NIU, Shuai LI, Zhihong DONG, Zebin BAO, Shenglong ZHU. Thermal Cycling and Flame Thermal Shocking Failure Mechanism of Tetragonal Yttria-stabilized Zirconia TBCs Prepared on High Temperature Alloys by Suspension Plasma Spraying[J]. Chinese Journal of Materials Research, 2024, 38(9): 691-700.

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摘要:

以四方相YSZ粉末为原料用悬浮液等离子喷涂技术制备具有类柱状结构的陶瓷层，研究了其在1100℃热循环和1300℃热冲击的失效行为。结果表明，这种陶瓷层具有优异的抗热循环和抗热冲击性能，且始终保持四方相。这种涂层在热循环和热冲击中的失效机理不同：在热循环过程中，陶瓷层与热生长氧化物之间热膨胀系数不匹配使两者剥离；而在热冲击产生的冷热循环中陶瓷层中的柱间间隙演变为贯穿裂纹并成为热通道，使粘结层严重氧化和热障涂层失效。

关键词 ：材料表面与界面, 悬浮液等离子喷涂, 热障涂层, 热循环, 热冲击, 失效机理

Abstract：

In this paper, thermal barrier ceramic coatings (TBCs) with columnar-like structure were prepared on high temperature alloys N5 and DZ411 by suspension plasma spraying, using tetragonal yttria stabilization zirconia (YSZ) powder as raw material. The failure behavior of TBCs was assessed by thermal cycling test (i.e. furnace heating to 1100^oC for 60 min. and then air cooling for 10 min. as one cycle), and flame thermal shocking test (i.e. quick flame heating to 1300^oC and then compressed air cooling to below 300^oC as one cycle) respectively. The results show that the coatings have excellent resistance to thermal cycling and flame thermal shocking, and the phase composition of ceramic coatings maintains tetragonal crystallographic structure after all the tests. The failure mechanism of TBCs in thermal cycling and flame thermal shocking is different. Delamination failure occurs at the interface between the ceramic layer and thermal grown oxides (TGO) during thermal cycling, caused by the mismatch of different thermal expansion coefficient. Besides, the main failure source of TBCs during flame thermal shocking is severe internal oxidation of bond coat due to the formation of hot channel, which is converted from gaps between columnar.

Key words： surface and interface in the materials suspension plasma spraying thermal barrier coatings thermal cycle thermal shock failure mechanism

收稿日期: 2023-09-19

ZTFLH:

TG174.45

基金资助:国家自然科学基金(51671202, 52301116);两机基础中心项目(P2021-A-IV-002-001);国家科技重大专项(J2019-IV-0006-0074);中国科学院重点部署项目(ZDRW-CN-2021-2-2)

通讯作者: 鲍泽斌，研究员，zbbao@imr.ac.cn，研究方向为高性能高温防护热障涂层体系设计

Corresponding author: BAO Zebin, Tel: (024)23881473, E-mail: zbbao@imr.ac.cn

作者简介: 黄迪，男，1998年生，博士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2023.471 或 https://www.cjmr.org/CN/Y2024/V38/I9/691

表1 N5和DZ411高温合金的成分

表2 悬浮液等离子喷涂参数

图1 制备态陶瓷层的微观结构、表面形貌和柱内高倍放大照片

图2 制备态陶瓷层的XRD谱

图3 1100℃热循环失效后的陶瓷层、完整TGO区域和柱内结构的高倍微观截面照片

图4 TGO区域的线元素扫描结果

图5 陶瓷层的制备态和热循环过程中的XRD谱

图6 热障涂层热冲击5000次和10000次后的微观截面照片

图7 陶瓷层的制备态和热冲击10000次后的XRD谱

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